[tor-bugs] #7281 [Torflow]: Bandwidth auths should publish average and weighted onionskin failure rates

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#7281: Bandwidth auths should publish average and weighted onionskin failure rates
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 Reporter:  mikeperry    |          Owner:  aagbsn
     Type:  enhancement  |         Status:  new   
 Priority:  major        |      Milestone:        
Component:  Torflow      |        Version:        
 Keywords:               |         Parent:  #5456 
   Points:               |   Actualpoints:        
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 While testing for path bias rates, I've noticed that the onionskin failure
 rate in the network can vary as much as +/- 30% in the matter of a few
 hours. This is rather insane.

 We should publish statistics on this failure rate over time somehow. This
 might be a metrics task, but if the bandwidth auths do it, we can have
 them set consensus parameters for the path bias code to decide on how
 loudly to scream and when (see Proposal 209).

 For that, I think I want network-wide averages, as well as consensus-
 bandwidth weighted averages. The path bias levels should be set using
 consensus-bandwidth weighted values.

 See also #5457, but I don't think we should do that anymore, based on how
 easy it seems to be to cause onionskin overload.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7281>
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